Language is an important factor in how hard the project will be to run/build, modify or otherwise actually work with. If it's a library for a language I don't use, I'd like to know that pretty quickly.

That's probably spelled out or trivial to infer from the readme (or file structure, top-level metadata & packaging files are generally obvious). Knowing pretty quickly I get, but the current prominent (most so for some languages with bright red-ish colors) bar takin the whole width of the screen is way over the top.